Fibonacci Ciaconna is part of a series of pieces (Fibonacci for strings, 2002, for the Haydn orchestra, Fibonacci Tango, 2001, for the ensemble Fantango) inspired by a numerical sequence created by the Italian mathematician Leonardo Fibonacci (c.1175 - 1250). The series begins with 0 and 1. After that, use the simple rule: add the last two numbers to get the next.